Square-hole cutter



vA. vLYsmK. SQUARE HOLE uTTER. APPLICATION FILEDJULY ll. I92 I.

1,402,51 0. Patented Jan. 3, 1922.

2 SHEETS-SHEET l.

FIG. 1. HG2.

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A. LYSIAK.

SQUARE HOLE CUTTER.

APPLICATION F1LED1uLY11,1921.

Patented Jan. 3, 1922,.

. j UNITED 4srae'rrzs PATENT OFFICE.

ANTONI LYSIAK, or MANCHESTER, MAssAcUsnTTs.

SQUARE-HOLE GUTTER.

rename.

, To all whom it may concern Be it known that I, ANTONI LYSIAK, a i

citizen of Poland, residing at Manchester, in the county of Essex and State or" :Massachusetts,'have invented certain new and useful Improvements in Square-Hole Cutters, otwhich the following is a specification.

This invention relates to certain new and useful improvements in square hole cutters and has yparticular Vreference tothe proviv sion of improved means for forming square holes. n

lny various bodies such as in pieces oi work `to be joined by special forms of bolts as set `forth vin my copending application Serial Number 483,784 tiled July 11, 1921, upon joint or connection.

The primary object of the invention is to provide a device embodying simplicity and durability of construction for readily and easily forming` square or other angular holes.

Another object of the invention is to provide manually operable means for drilling a circular hole, and means operatively connected with said drilling means for cutting away portions, surrounding the circular hole so as to form an angular hole for the reception ot angular bolts or the like in joints or connections between pieces oi' worker struc-` tural elements.

A still further object of the invention is tofprovide means operatively connected to a rotary drill including reciprocable cutters adaptedto enlargethe circular hole formed bythe drill in such manner asto produce an angular hole in pieces to be joined.

,A still further object of the invention'is to .provide a device of the above kind in which the reciprocable cutters are mounted i in :tp-'separable guide and detachably con n specification 'of Leuersratem. 'd Patentedja, 3, 1922,

Application ined July 11, 1921. serial No. 483,783.,

Figure 1 is al side elevational view of a square hole cutter constructed in accordance with lthe present invention,l

Figure 2 is la `front elevational view thereof, -V l j Figure 371s a horizontal sectional view taken upon linelII-III of Figure 1.

`Figure e is a view similar to Figure 3l taken upon line 'IV-IV of Figure 1f, l

Figure 5 is a view similar to Figure 4 taken upon line V-V of Figure 27V Figure 6 is a fragmentary` View partly in elevation and partly in:` vertical section` showing the actuating means for the reciprocating cutters, j j v Figure 7 is a `transverse sectional View` taken upon line VlL-Vllof Figure 8, and

Figure S is a plan view of the cutter guide.` c y i y Referring more in detail .to the `several views the invention embodies a frame 5 having a horizontal shaft 6 journaled in the upper. end thereof in spaced bearings 7 with f one end of said shaft having a. large beveled gear 8 secured thereon and meshing with a smaller beveled gear 9 iXedupon avertical shaftrlO having its `upper end journaled as at 11 in the frame 5; The lower end of the frame 5 is attached in any suitable manner to a horizontal guide plate formed in half sections'12and 13 which may have their adjacent edges rabbeted and overlapped as shown at- 14- in Figure 7, the i two sections being i secured` together by means of plates 15 and bolts 16 which pass through the guide plate sections and through said plates 15,1the guide plate being provided with a central circular opening as at 17 betweenthe connecting plates 15 through which the shaftl() rotatably eX- tends.

A spiral drill 18 is secured in any desired manner upon the lower end of the shaft 10 so as to bedetachable from the same and a suitable crank handle 19 is provided upon the large bevel gear 8 so that the drill may v be rotated manually in the desired direction through the gearing described. The guide plate composed of the sections 12 and 13 is provided with circular openings 2O in each ofthe four corners thereof and vertically movable stems 21 have their upper ends reduced as at 22 and slidably mounted through said openings 20, the stems 21 having right being normally yieldingly "forced down-,-

,Y angular vcutters V23 suitably secured f upon their lower ends in proximity to the `lower end of the drill or auger 18, the stemsr21 wardly by means of springs 24 and intermittently elevated by'means of a pluralityofA camfV arms 25. fixed to land radiallyprojecting lfro'mf a collar"26 engaging`the cam surfaces of correspondingcam arms 27 fixedY upon the upper Vends 22 of the stems 21 above the guide Aplate composed/of theV sections'12'v VVand 13.' It willk1 be'seen that when the cam arms l25 simultaneously ride under the four cam arms 27, the four stems21 will be s1- multaneously elevated against the action of the springs 24 vand when the arms 25 pass the arms 27? the springs 2e will forcibly project the stems 21 downwardly and cause the knives or cutters 23 to cut away the material about the opening formedby the auger 18 so as tdproducea square opening in the work. t f f ln order to ybrace the stems 21 against lateral strains so that the same will-operate etliciently and cause the cutters 23 to be directed properly into the work, said stems are lconnected inseries by a rectangular` lframe formed in half sections 28 of sheet metal strips with their opposite endpor tionsl overlapped and bolted together as at 29 so that the frame sections 28 and the i Vguide platesections 12 and l13 may be sepa ratedV for permitting ready access to the auger 18 forrenewal of the' latter whenever desired. i Y

Y `In order to provide for the Vcutting awa)fr of the materialbetween the knives 23 and the auger 18,V said'auger is provided with aradial-projecting cutter 30 which may be fixed to the; lower end thereofby means of ascrew31 or the like and which is pref i erably provided with a beveled upper; sur-' 5o is cut and elevated by the cutter armV 30,

Y' 19, thus causing rotation of'shaft 10'through the bevel gear 9 and" accordingly 'rotating said finger 33 being positioned slightly above the cutter arm 30 'for this purpose as clearly shown in'Figure 2. f

Y In operation, rotation is imparted tothe gear 8 Vby manipulation ofthe crank handle the auger 18 and the cam arms 25. The

rotatienof the auger in theV proper direction Vcauses the same to Abe fed into the work for formingv a circular hole therein andV upon each quarter revolution of the shaft 10,v

.the arms 25 engage the camV arms 27 so vas lto elevatev the cutters 23 against the action of kthe springs 24a-nd thenpermit the springs 2li te forcibly projectrthe cutter 23 down -wardlysoV as .to define Vva square hole with which the Y auger 18 concentric and so that the cutter arm 30 may effectivelyr rem ve portions ofthe work `between the cutters .23k and the anger 18 in cooperation with the finger 33, which finger and cutter arm rotate Vwith the augeby being fixed thereto; 'ln manipulating the present tool, a handle 34! is provided upon the frame 5 so that the device may be. grasped in one as claimed.

`What is claimed as new is: square hole cutter comprising a frame having a horizontal'guide plate' at thelower end thereof provided with corner guide openings and a central opening` a vertical shaftjournaled in said central opening and having its upper end journaled inthe upper end of the frame, means to apply rotary motion to the upper Vend of said shaft, cutter of the guide plates and having riglit angular cutters upon the lower ends thereof, means above said guide plate'operatively connecting said stems to saidshaft whereby the stems arev reciprocated upon( vrotation of the-shaft, an auger concentric with said stemsiiX-ed upon the lower end of said shaft. a radial cutter Varm forlremoving material aboutwthel auger between the latter and the cutter knivesrigidly fixed to the lower end portion of said auger, means operating withY said auger to eject thematerial removed by said `radial cutter arm,"said radial cutter arm being provided with a beveled upper surface to cause outward-movement of the material removed thereby, and said material ejecting means including a finger Varranged in a plane above said cutter arm. Y ln testimony whereof ll aiix my signature.

ANTONI LYsIAK.

`stems slidable through the corner openings llO 

